Taylor TW-357 manual Kryos Kryos V9.0 & Kryos V9.0B Level Readings, Offset Value, Units of measure

TW-357 REV E

The Kryos Control installed on the Taylor-Wharton LABS80K refrigerator operates with software version 9.0 (regular operation) or 9.0B (battery backup). This control software has been specially designed to match the design characteristics of the LABS 80K refrigerator. The differences between the versions are in the table below

Table: Software version differences

	Kryos V4.0	Kryos V9.0 & Kryos V9.0B
Level Readings	1" increments (linear)	Level Range (nonlinear)
Default Start Fill / Stop Fill	3" / 6"	3" / 5"
Default Auto Defog	15 seconds	20 seconds
Offset Value	Adjustable (allows the sensor	Preset (sensor assembly located at
	assembly to be raised)	factory setting)
Units of measure	English / Metric	English

Version 9.0/9.0B Level Reading

The sensor tube on the LABS 80K refrigerator is installed through the annular space (vacuum) and takes a curve near the bottom. The sensor assembly accommodates this curve. Version V9.0/V9.0 software computes the non-linearity of the sensor assembly position. This software version displays the following readings on the Kryos display.

‰Thermistor #1 uncovered; Kryos will display "<2.8 in."

‰Thermistor #1 covered; Kryos will display "2.8 / 3.0 in."

‰Thermistor #2 covered; Kryos will display "3.0 / 3.3 in."

‰Thermistor #3 covered; Kryos will display "3.3 / 4.0 in."

‰Thermistor #4 covered; Kryos will display "4.0 / 5.0 in."

‰Thermistor #5 covered; Kryos will display "5.0 / 6.0 in."

‰Thermistor #6 covered; Kryos will display "6.0 / 7.0 in."

‰Thermistor #7 covered; Kryos will display "> 7.0 in."

Other Changes

‰The offset has been removed in this version of software to handle the non-linearity of the sensor when installed in the refrigerator.

‰Metric readings have been removed in this version of the software.

Recommendations for a Liquid Storage Application

If the LABS 80K will be used to store the product in Liquid Nitrogen, two options are available:

1.Version 4.0 software can be installed into the Kryos to provide the offset. This allows the control to recognize that the sensor has been raised off the floor of the refrigerator so that the correct level readings can be displayed. (P/N: EPROM-Kryos40)

2.The optional 4-thermistor sensor can be purchased from Taylor-Wharton to work with the Kryos control (works in either version of the software). This sensor allows the user to physically place the start fill and stop fill sensor at the appropriate level locations in the refrigerator. The Kryos then displays the level as High, Normal or Low (P/N: 5140-1163-4T)

To make adjustments to a sensor assembly in a refrigerator filled with LN2, the following procedure can be used:

•Measure the LN2 liquid level in the refrigerator.

•Take this measured level and subtract the offset to determine how many sensors should be in liquid.

•Go to “Test Level Sensor” through the KRYOS menu (MENU, 2, 1). “L” means a sensor is in liquid while “G” means a sensor is in gas.

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